//
//  WelcomeViewController.swift
//  XDweibo
//
//  Created by HanXingda on 15/6/28.
//  Copyright © 2015年 韩兴达. All rights reserved.
//

import UIKit
import SDWebImage
class WelcomeViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        //设置头像
        if let urlString = sharedUserAccount?.avatar_large {
            iconView.sd_setImageWithURL(NSURL(string: urlString))
        }
    }
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        self.bottomConstraint?.constant = -(UIScreen.mainScreen().bounds.height - 200)
        //动画效果
        UIView.animateWithDuration(2.0, delay: 0, usingSpringWithDamping: 10, initialSpringVelocity: 0.8, options: UIViewAnimationOptions.CurveEaseIn, animations: { () -> Void in
            self.view.layoutIfNeeded()
            }) { (_) -> Void in
                UIView.animateWithDuration(0.8, animations: { () -> Void in
                    self.messageLabel.alpha = 1.0

                    },completion: { _ in
                        // object = true 表示显示 MainViewController
                        NSNotificationCenter.defaultCenter().postNotificationName(SwitchViewControllerNotifocation, object: true)
                })

        }
    }
    var bottomConstraint: NSLayoutConstraint?
       override func loadView() {
        super.loadView()
        view = UIView()
        let backImageView = UIImageView(image: UIImage(named: "ad_background"))
        view.addSubview(backImageView)
        view.addSubview(iconView)
        view.addSubview(messageLabel)
        
        //设置布局
        backImageView.translatesAutoresizingMaskIntoConstraints = false
        view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|[subView]|", options: NSLayoutFormatOptions.AlignAllBaseline, metrics: nil, views: ["subView" : backImageView]))
        view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|[subView]|", options: NSLayoutFormatOptions.AlignAllBaseline, metrics: nil, views: ["subView" : backImageView]))
       iconView.translatesAutoresizingMaskIntoConstraints = false
        view.addConstraint(NSLayoutConstraint(item: iconView, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: view, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0))
       bottomConstraint = NSLayoutConstraint(item: iconView, attribute: NSLayoutAttribute.Bottom, relatedBy: NSLayoutRelation.Equal, toItem: view, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: -160)
        view.addConstraint(bottomConstraint!)
        view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:[subView(90)]", options: NSLayoutFormatOptions.AlignAllBaseline, metrics: nil, views: ["subView" : iconView]))
        view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:[subView(90)]", options: NSLayoutFormatOptions.AlignAllBaseline, metrics: nil, views: ["subView" : iconView]))
        messageLabel.translatesAutoresizingMaskIntoConstraints = false
        view.addConstraint(NSLayoutConstraint(item: messageLabel, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: iconView, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0))
        view.addConstraint(NSLayoutConstraint(item: messageLabel, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: iconView, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 10))
    }
    //懒加载
    lazy var iconView: UIImageView = {
        
        let iv = UIImageView(image: UIImage(named: "avatar_default_big"))
        iv.layer.cornerRadius = 45
        iv.layer.masksToBounds = true
        return iv
        }()
    lazy var messageLabel: UILabel = {
       
        let label = UILabel()
        label.text = "欢迎归来"
        label.sizeToFit()
        label.alpha = 0
        return label
    }()

}
